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Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets | Intangible assets consists of the following:
| September 30, 2025 |  | December 31, 2024
(Dollars in millions) | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Acquired intangible assets | $ | 1,087 |  |  | $ | (978) |  |  | $ | 109 |  |  | $ | 1,087 |  |  | $ | (962) |  |  | $ | 125 |
Patents and licenses | 14 |  |  | (9) |  |  | 5 |  |  | 14 |  |  | (7) |  |  | 7 |
Total intangible assets | $ | 1,101 |  |  | $ | (987) |  |  | $ | 114 |  |  | $ | 1,101 |  |  | $ | (969) |  |  | $ | 132 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 40 -SubTopic 30 -Topic 350 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
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